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https://www.readbyqxmd.com/read/28597389/enhanced-fenton-like-degradation-of-tce-in-sand-suspensions-with-magnetite-by-nta-edta-at-circumneutral-ph
#1
Na Wang, Daqing Jia, Yaoyao Jin, Sheng-Peng Sun, Qiang Ke
The present study investigated the degradation of trichloroethylene (TCE) in sand suspensions by Fenton-like reaction with magnetite (Fe3O4) in the presence of various chelators at circumneutral pH. The results showed that ethylenediaminetetraacetic acid (EDTA) and nitrilotriacetic acid (NTA) greatly improved the rate of TCE degradation, while [S,S]-ethylenediaminedisuccinic acid (s,s-EDDS), malonate, citrate, and phytic acid (IP6) have minimal effects on TCE degradation. Quenching tests suggested that TCE was mainly degraded by hydroxyl radical (HO(·)) attack, with about 90% inhibition on TCE degradation by the addition of HO(·) scavenger 2-propanol...
June 8, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28589488/negative-electron-transfer-dissociation-sequencing-of-increasingly-sulfated-glycosaminoglycan-oligosaccharides-on-an-orbitrap-mass-spectrometer
#2
Franklin E Leach, Nicholas M Riley, Michael S Westphall, Joshua J Coon, I Jonathan Amster
The structural characterization of sulfated glycosaminoglycan (GAG) carbohydrates remains an important target for analytical chemists attributable to challenges introduced by the natural complexity of these mixtures and the defined need for molecular-level details to elucidate biological structure-function relationships. Tandem mass spectrometry has proven to be the most powerful technique for this purpose. Previously, electron detachment dissociation (EDD), in comparison to other methods of ion activation, has been shown to provide the largest number of useful cleavages for de novo sequencing of GAG oligosaccharides, but such experiments are restricted to Fourier transform ion cyclotron resonance mass spectrometers (FTICR-MS)...
June 6, 2017: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/28583071/volume-time-curve-of-cardiac-magnetic-resonance-assessed-left-ventricular-dysfunction-in-coronary-artery-disease-patients-with-type-2-diabetes-mellitus
#3
Hua-Yan Xu, Zhi-Gang Yang, Ying-Kun Guo, Ke Shi, Xi Liu, Qin Zhang, Li Jiang, Lin-Jun Xie
BACKGROUND: Type 2 diabetes mellitus (DM2) may induce epicardial coronary artery diseases and left ventricular myocardial damaging as well. Left ventricular dysfunction was found in DM2. In this research, we compared the left ventricular dysfunction of coronary artery disease (CAD) patients with and without type 2 diabetes mellitus as well as normal controls using the volume-time curve of cardiac magnetic resonance (CMR). METHODS: Sixty-one CAD patients (28 with DM2 and 33 without DM2) and 18 normal individuals were enrolled in this study...
June 5, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28574691/crystal-structure-of-a-bacterial-l-arabinonate-dehydratase-contains-2fe-2s-cluster
#4
Mohammad Mubinur Rahman, Martina Blomster Andberg, Senthil Kumar Thangaraj, Tarja Parkkinen, Merja Penttilä, Janne Jänis, Anu Koivula, Juha Rouvinen, Nina Hakulinen
We present a novel crystal structure of the IlvD/EDD family enzyme, L-arabinonate dehydratase from Rhizobium leguminosarum bv. trifolii (RlArDHT, EC 4.2.1.25), which catalyzes the conversion of L-arabinonate to 2-dehydro-3-deoxy-L-arabinonate. The enzyme is a tetramer consisting of a dimer of dimers, where each monomer is composed of two domains. The active site contains a catalytically important [2Fe-2S] cluster and Mg2+ ion, and is buried between two domains, and also at the dimer interface. The active site Lys129 was found to be carbamylated...
June 2, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28561260/analysis-of-gluconate-metabolism-for-pyruvate-production-in-engineered-e-coli-based-on-genome-wide-transcriptomes
#5
Maohua Yang, Tingzhen Mu, Wei Zhong, Ayobami Matthew Olajuyin, Jianmin Xing
For pyruvate-producing strains, intracellular NADH accumulation is the main reason for the glycolysis inhibition. Comparing with glucose, using sodium gluconate as carbon source brought a decrease of NADH production and an increase of pyruvate production in engineered strain YP211. In order to explore the metabolic advantages of gluconate, genome-wide transcriptome analysis was employed to compare the metabolic differences between the two carbon sources. The results showed that the transcription of the genes gntU, gntK, and gntT responsible for transport and phosphorylation of gluconate, and genes edd and eda belonging to the Entner-Doudoroff (ED) pathway, was significantly enhanced...
May 31, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/28550299/microfluidic-isolation-of-circulating-tumor-cell-clusters-by-size-and-asymmetry
#6
Sam H Au, Jon Edd, Amy E Stoddard, Keith H K Wong, Fabio Fachin, Shyamala Maheswaran, Daniel A Haber, Shannon L Stott, Ravi Kapur, Mehmet Toner
Circulating tumor cell clusters (CTC clusters) are potent initiators of metastasis and potentially useful clinical markers for patients with cancer. Although there are numerous devices developed to isolate individual circulating tumor cells from blood, these devices are ineffective at capturing CTC clusters, incapable of separating clusters from single cells and/or cause cluster damage or dissociation during processing. The only device currently able to specifically isolate CTC clusters from single CTCs and blood cells relies on the batch immobilization of clusters onto micropillars which necessitates long residence times and causes damage to clusters during release...
May 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28549193/label-free-direct-localization-and-relative-quantitation-of-the-rna-nucleobase-methylations-m6a-m5c-m3u-and-m5u-by-top-down-mass-spectrometry
#7
Heidelinde Glasner, Christian Riml, Ronald Micura, Kathrin Breuker
Nucleobase methylations are ubiquitous posttranscriptional modifications of ribonucleic acids (RNA) that can substantially increase the structural diversity of RNA in a highly dynamic fashion with implications for gene expression and human disease. However, high throughput, deep sequencing does not generally provide information on posttranscriptional modifications (PTMs). A promising alternative approach for the characterization of PTMs, i.e. their identification, localization, and relative quantitation, is top-down mass spectrometry (MS)...
May 26, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28494356/appraising-the-role-of-environment-friendly-chelants-in-alleviating-lead-by-coronopus-didymus-from-pb-contaminated-soils
#8
Gagan Preet Singh Sidhu, Harminder Pal Singh, Daizy R Batish, Ravinder Kumar Kohli
In a screenhouse experiment, we investigated the role of two environment friendly chelants, Ammonium molybdate and EDDS for Pb mobilisation and its extraction by Coronopus didymus under completely randomized controlled conditions. Seedlings of C. didymus were grown in pots having Pb-contaminated soil (1200 and 2200 mg kg(-1)) for 6 weeks. Plants were harvested, 1 week after the addition of A. molybdate and EDDS. Results revealed that A. molybdate and EDDS enhanced the uptake and accumulation of Pb in roots and shoots of C...
May 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/28489612/correlation-between-ambulatory-blood-pressure-variability-and-vasodilator-function-in-middle-aged-normotensive-individuals
#9
Minlie Liang, Shanghua Xu, Shunxiang Luo, Fei Miao, Yingfeng Liu, Wenliang Zhong
OBJECTIVE: The aim of this study was to investigate the association between ambulatory blood pressure variability and vasodilator function in a cohort of normotensive middle-aged individuals. PARTICIPANTS AND METHODS: This was a cross-sectional study of 285 randomly selected 40-59-year-old normotensive participants who underwent 24-h ambulatory blood pressure monitoring and brachial artery ultrasound assessment. Systolic and diastolic blood pressure variability (BPV) of 24-h, daytime, and night-time were calculated using the coefficients of variation (CV) and the average real variability (ARV) index...
May 3, 2017: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/28461035/maladaptive-eating-behavior-assessment-among-bariatric-surgery-candidates-evaluation-of-the-eating-disorder-diagnostic-scale
#10
Gail A Williams, Misty A W Hawkins, Jennifer Duncan, Christina M Rummell, Shannon Perkins, Janis H Crowther
BACKGROUND: Eating pathology among bariatric surgery candidates is common and associated with adverse outcomes. However, its assessment is complicated by the inconsistent use of standardized measures. We addressed this by examining the use of the Eating Disorder Diagnostic Scale (EDDS) in a large bariatric sample (N = 343). OBJECTIVES: To evaluate the EDDS among bariatric surgery candidates via examination of: (1) Diagnostic and Statistical Manual of Mental Disorders, fourth edition, text revision (DSM-IV-TR) and fifth edition (DSM-5) rates of binge eating disorder, bulimia nervosa, and maladaptive eating behaviors, and (2) the relationship between response biases and self-reported eating disorder symptoms...
March 15, 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28452034/deciphering-biodegradable-chelant-enhanced-phytoremediation-through-microbes-and-nitrogen-transformation-in-contaminated-soils
#11
Linchuan Fang, Mengke Wang, Lin Cai, Long Cang
Biodegradable chelant-enhanced phytoremediation offers an alternative treatment technique for metal contaminated soils, but most studies to date have addressed on phytoextraction efficiency rather than comprehensive understanding of the interactions among plant, soil microbes, and biodegradable chelants. In the present study, we investigated the impacts of biodegradable chelants, including nitrilotriacetate, S,S-ethylenediaminedisuccinic acid (EDDS), and citric acid on soil microbes, nitrogen transformation, and metal removal from contaminated soils...
June 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28451667/potassium-adsorption-behavior-on-hcp-cobalt-as-model-systems-for-the-fischer-tropsch-synthesis-a-density-functional-theory-study
#12
Qingjun Chen, Ingeborg-Helene Svenum, Yanying Qi, Ljubisa Gavrilovic, De Chen, Anders Holmen, Edd A Blekkan
Potassium (K), an important impurity in syngas from biomass, can have a large influence on the activity and selectivity of cobalt-based Fischer-Tropsch synthesis (FTS) catalysts in Biomass to Liquids (BTL) processes. In this work, the potassium adsorption behavior on hcp cobalt was systematically studied using density functional theory. The surface energy calculations and Wulff construction of the equilibrium shape of hcp cobalt showed it is dominated by 10 facets. The interaction of K with these facets has been investigated...
May 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28433695/disinfection-of-water-inoculated-with-enterococcus-faecalis-using-solar-fe-iii-edds-h2o2-or-s2o8-2-process
#13
A Bianco, M I Polo López, P Fernández Ibáñez, M Brigante, G Mailhot
In this study, the activation of H2O2 and persulfate ions induced by solar photolysis of Fe(III)EDDS complex were investigated in water disinfection, applying solar AOPs processes. The use of Fe(III)EDDS complex maintains iron in soluble form until slightly basic pH and so the photolysis is efficient in a large range of pH compatible with natural waters. Moreover, for the first time, the impact of photogenerated hydroxyl and sulfate radicals on the inactivation of Enterococcus faecalis in water was studied...
July 1, 2017: Water Research
https://www.readbyqxmd.com/read/28427639/synergistic-degradation-of-antibiotic-norfloxacin-in-a-novel-heterogeneous-sonochemical-fe-0-tetraphosphate-fenton-like-system
#14
Tao Zhou, Xiaoli Zou, Xiaohui Wu, Juan Mao, Jia Wang
In this study, synergistic degradation of antibiotic norfloxacin (NOR) was obtained in a novel sonochemical ultrasound/zero-valent iron/tetraphosphate system (US/ZVI/TPP). Compared to three common organic ligands (EDTA, EDDS, and DTPA), TPP could perform more excellently in activation of O2 to produce reactive oxidative species (ROS) and lead to efficient Fenton-like oxidative degradation of NOR in the sonochemical in situ chemical oxidation (ISCO) system. An optimized initial condition was obtained as 10mg/L NOR, 0...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28426621/committee-opinion-no-700-methods-for-estimating-the-due-date
#15
(no author information available yet)
Accurate dating of pregnancy is important to improve outcomes and is a research and public health imperative. As soon as data from the last menstrual period, the first accurate ultrasound examination, or both are obtained, the gestational age and the estimated due date (EDD) should be determined, discussed with the patient, and documented clearly in the medical record. Subsequent changes to the EDD should be reserved for rare circumstances, discussed with the patient, and documented clearly in the medical record...
May 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28426616/committee-opinion-no-700-summary-methods-for-estimating-the-due-date
#16
(no author information available yet)
Accurate dating of pregnancy is important to improve outcomes and is a research and public health imperative. As soon as data from the last menstrual period, the first accurate ultrasound examination, or both are obtained, the gestational age and the estimated due date (EDD) should be determined, discussed with the patient, and documented clearly in the medical record. Subsequent changes to the EDD should be reserved for rare circumstances, discussed with the patient, and documented clearly in the medical record...
May 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28417257/additive-effect-of-congenital-heart-disease-and-early-developmental-disorders-on-attention-deficit-hyperactivity-disorder-and-autism-spectrum-disorder-a-nationwide-population-based-longitudinal-study
#17
Pei-Chen Tsao, Yu-Sheng Lee, Mei-Jy Jeng, Ju-Wei Hsu, Kai-Lin Huang, Shih-Jen Tsai, Mu-Hong Chen, Wen-Jue Soong, Yu Ru Kou
In this retrospective nationwide population-based case-control study, we investigated the impact of congenital heart disease (CHD) on the development of attention-deficit/hyperactivity disorder (ADHD) and autism spectrum disorder (ASD), which remains unclear. Children aged <18 years that were diagnosed with CHD (n = 3552) between January 1, 1997 and December 31, 2009 were identified from the National Health Insurance Research Database in Taiwan. Non-CHD controls (n = 14,208) matched for age and sex (1:4) were selected from the same dataset...
April 17, 2017: European Child & Adolescent Psychiatry
https://www.readbyqxmd.com/read/28390437/brain-structural-investigation-and-hippocampal-tractography-in-medication-overuse-headache-a-native-space-analysis
#18
M Meyer, G Di Scala, M Edde, B Dilharreguy, F Radat, M Allard, S Chanraud
BACKGROUND: Spatial normalization of brain images, a prerequisite for voxel based morphometry analysis, may account for the large variability of the volumetric data in medication overuse headache (MOH); possibly because this disease concerns patients differing on both sex and age, and hence with different brain size and shape. METHODS: The present study aimed at providing a subject-based analysis of macrostructure using a native space volumes segmentation (Freesurfer), and microstructure using a region of interest (ROI: i...
April 8, 2017: Behavioral and Brain Functions: BBF
https://www.readbyqxmd.com/read/28389983/single-stage-tandem-mass-spectrometry-assignment-of-the-c-5-uronic-acid-stereochemistry-in-heparan-sulfate-tetrasaccharides-using-electron-detachment-dissociation
#19
Isaac Agyekum, Chengli Zong, Geert-Jan Boons, I Jonathan Amster
The analysis of heparan sulfate (HS) glycosaminoglycans presents many challenges, due to the high degree of structural heterogeneity arising from their non-template biosynthesis. Complete structural elucidation of glycosaminoglycans necessitates the unambiguous assignments of sulfo modifications and the C-5 uronic acid stereochemistry. Efforts to develop tandem mass spectrometric-based methods for the structural analysis of glycosaminoglycans have focused on the assignment of sulfo positions. The present work focuses on the assignment of the C-5 stereochemistry of the uronic acid that lies closest to the reducing end...
April 7, 2017: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/28383659/the-proteins-api-accessing-key-integrated-protein-and-genome-information
#20
Andrew Nightingale, Ricardo Antunes, Emanuele Alpi, Borisas Bursteinas, Leonardo Gonzales, Wudong Liu, Jie Luo, Guoying Qi, Edd Turner, Maria Martin
The Proteins API provides searching and programmatic access to protein and associated genomics data such as curated protein sequence positional annotations from UniProtKB, as well as mapped variation and proteomics data from large scale data sources (LSS). Using the coordinates service, researchers are able to retrieve the genomic sequence coordinates for proteins in UniProtKB. This, the LSS genomics and proteomics data for UniProt proteins is programmatically only available through this service. A Swagger UI has been implemented to provide documentation, an interface for users, with little or no programming experience, to 'talk' to the services to quickly and easily formulate queries with the services and obtain dynamically generated source code for popular programming languages, such as Java, Perl, Python and Ruby...
April 5, 2017: Nucleic Acids Research
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